6251881 has 2 divisors, whose sum is σ = 6251882. Its totient is φ = 6251880.

The previous prime is 6251873. The next prime is 6251887. The reversal of 6251881 is 1881526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5784025 + 467856 = 2405^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 6251881 - 2³ = 6251873 is a prime.

It is a super-2 number, since 2×6251881² = 78172032076322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6251887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3125940 + 3125941.

It is an arithmetic number, because the mean of its divisors is an integer number (3125941).

Almost surely, 2^6251881 is an apocalyptic number.

It is an amenable number.

6251881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6251881 is an equidigital number, since it uses as much as digits as its factorization.

6251881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 31.

The square root of 6251881 is about 2500.3761716990. The cubic root of 6251881 is about 184.2200521805.

The spelling of 6251881 in words is "six million, two hundred fifty-one thousand, eight hundred eighty-one".